| Synthesis, characterization and fluorescence of N,N'-BIS (6-metyl-2-pyridine-carboxylamide-N-oxide)-1,2-ethane and corresponding rare earth (Ⅲ) complexes |
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| 引用本文： | GOU Ruhu,WANG Yaling,YANG Rudong,YAN Lan. Synthesis, characterization and fluorescence of N,N'-BIS (6-metyl-2-pyridine-carboxylamide-N-oxide)-1,2-ethane and corresponding rare earth (Ⅲ) complexes[J]. 中国稀土学报(英文版), 2009, 27(5): 790-796. DOI: 10.1016/S1002-0721(08)60336-1 |
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| 作者姓名： | GOU Ruhu WANG Yaling YANG Rudong YAN Lan |
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| 作者单位： | Department of Chemistry and life Science, Hezuo Minorities Teachers' College, Hezuo 747000, China;College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China Department of Chemistry and life Science, Hezuo Minorities Teachers' College, Hezuo 747000, China College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China |
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| 摘 要： |
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| 收稿时间： | 2008-10-08 |
| 修稿时间： | 3 January 2009. |
Synthesis, characterization and fluorescence of N,N'-BIS (6-metyl-2-pyridine-carboxylamide-N-oxide)-1,2-ethane and corresponding rare earth (III) complexes |
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| GOU Ruhu WANG Yaling YANG Rudong YAN Lan. Synthesis, characterization and fluorescence of N,N'-BIS (6-metyl-2-pyridine-carboxylamide-N-oxide)-1,2-ethane and corresponding rare earth (III) complexes[J]. Journal of Rare Earths, 2009, 27(5): 790-796. DOI: 10.1016/S1002-0721(08)60336-1 |
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| Authors: | GOU Ruhu WANG Yaling YANG Rudong YAN Lan |
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| Affiliation: | aDepartment of Chemistry and Life Science, Hezuo Minorities Teachers' College, Hezuo 747000, China;bCollege of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China |
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| Abstract: | A new ligand, N,N-BIS (6-metyl-2-pyridinecarboxylamide-N-oxide)-1,2-ethane (L) and six lanthanide(III) complexes (RE=La, Sm, Eu, Tb, Gd, Yb) were synthesized and characterized in detail. The results indicated that the composition of the binary complexes was determined as [REL(H2O)(NO3)2]NO3·nH2O (n=0–2), and the Eu3+ complex had bright red fluorescence in solid state. Three complexes of Eu3+, Tb3+, and Gd3+ with 6-methylpicolinic acid N-oxide (L') were also synthesized. The relative intensity of sensitized luminescence for Eu3+ increased in the following order: L>L'. The phosphorescence spectra of the Gd3+ complexes at 77 K were measured. The energies of excited triplet state for the ligands were 20704 cm−1 (L) and 20408 cm−1 (L'). The facts that the ligands sensitized Eu3+ strongly and the order of the emission intensity for Eu3+ complexes were explained by ΔE(T-5D). This meant that the triplet energy level of the ligand was the main factor to influence RE3+ luminescence. |
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| Keywords: | 6-methylpicolinic acid N-oxide binary complex Eu3+ and Tb3+ complexes rare earths |
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